Commit 6ebd5a44 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Darrick J. Wong

xfs: introduce xfs_bmapi_remap

Add a new helper to be used for reflink extent list additions instead of
funneling them through xfs_bmapi_write and overloading the firstblock
member in struct xfs_bmalloca and struct xfs_alloc_args.

With some small changes to xfs_bmap_remap_alloc this also means we do
not need a xfs_bmalloca structure for this case at all.
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
parent 6d04558f
...@@ -3862,11 +3862,12 @@ xfs_bmap_btalloc( ...@@ -3862,11 +3862,12 @@ xfs_bmap_btalloc(
*/ */
STATIC int STATIC int
xfs_bmap_remap_alloc( xfs_bmap_remap_alloc(
struct xfs_bmalloca *ap) struct xfs_trans *tp,
struct xfs_inode *ip,
xfs_fsblock_t startblock,
xfs_extlen_t length)
{ {
struct xfs_trans *tp = ap->tp;
struct xfs_mount *mp = tp->t_mountp; struct xfs_mount *mp = tp->t_mountp;
xfs_fsblock_t bno;
struct xfs_alloc_arg args; struct xfs_alloc_arg args;
int error; int error;
...@@ -3875,24 +3876,24 @@ xfs_bmap_remap_alloc( ...@@ -3875,24 +3876,24 @@ xfs_bmap_remap_alloc(
* and handle a silent filesystem corruption rather than crashing. * and handle a silent filesystem corruption rather than crashing.
*/ */
memset(&args, 0, sizeof(struct xfs_alloc_arg)); memset(&args, 0, sizeof(struct xfs_alloc_arg));
args.tp = ap->tp; args.tp = tp;
args.mp = ap->tp->t_mountp; args.mp = mp;
bno = *ap->firstblock; args.agno = XFS_FSB_TO_AGNO(mp, startblock);
args.agno = XFS_FSB_TO_AGNO(mp, bno); args.agbno = XFS_FSB_TO_AGBNO(mp, startblock);
args.agbno = XFS_FSB_TO_AGBNO(mp, bno);
if (args.agno >= mp->m_sb.sb_agcount || if (args.agno >= mp->m_sb.sb_agcount ||
args.agbno >= mp->m_sb.sb_agblocks) args.agbno >= mp->m_sb.sb_agblocks)
return -EFSCORRUPTED; return -EFSCORRUPTED;
/* "Allocate" the extent from the range we passed in. */ /* "Allocate" the extent from the range we passed in. */
trace_xfs_bmap_remap_alloc(ap->ip, *ap->firstblock, ap->length); trace_xfs_bmap_remap_alloc(ip, startblock, length);
ap->blkno = bno;
ap->ip->i_d.di_nblocks += ap->length; ip->i_d.di_nblocks += length;
xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
/* Fix the freelist, like a real allocator does. */ /* Fix the freelist, like a real allocator does. */
args.datatype = ap->datatype; args.datatype = XFS_ALLOC_USERDATA | XFS_ALLOC_NOBUSY;
args.pag = xfs_perag_get(args.mp, args.agno); args.pag = xfs_perag_get(mp, args.agno);
ASSERT(args.pag); ASSERT(args.pag);
/* /*
...@@ -3905,7 +3906,7 @@ xfs_bmap_remap_alloc( ...@@ -3905,7 +3906,7 @@ xfs_bmap_remap_alloc(
error = xfs_alloc_fix_freelist(&args, XFS_ALLOC_FLAG_FREEING); error = xfs_alloc_fix_freelist(&args, XFS_ALLOC_FLAG_FREEING);
xfs_perag_put(args.pag); xfs_perag_put(args.pag);
if (error) if (error)
trace_xfs_bmap_remap_alloc_error(ap->ip, error, _RET_IP_); trace_xfs_bmap_remap_alloc_error(ip, error, _RET_IP_);
return error; return error;
} }
...@@ -3917,8 +3918,6 @@ STATIC int ...@@ -3917,8 +3918,6 @@ STATIC int
xfs_bmap_alloc( xfs_bmap_alloc(
struct xfs_bmalloca *ap) /* bmap alloc argument struct */ struct xfs_bmalloca *ap) /* bmap alloc argument struct */
{ {
if (ap->flags & XFS_BMAPI_REMAP)
return xfs_bmap_remap_alloc(ap);
if (XFS_IS_REALTIME_INODE(ap->ip) && if (XFS_IS_REALTIME_INODE(ap->ip) &&
xfs_alloc_is_userdata(ap->datatype)) xfs_alloc_is_userdata(ap->datatype))
return xfs_bmap_rtalloc(ap); return xfs_bmap_rtalloc(ap);
...@@ -4554,9 +4553,7 @@ xfs_bmapi_write( ...@@ -4554,9 +4553,7 @@ xfs_bmapi_write(
ASSERT(len > 0); ASSERT(len > 0);
ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL); ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL);
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
ASSERT(!(flags & XFS_BMAPI_REMAP) || whichfork == XFS_DATA_FORK); ASSERT(!(flags & XFS_BMAPI_REMAP));
ASSERT(!(flags & XFS_BMAPI_PREALLOC) || !(flags & XFS_BMAPI_REMAP));
ASSERT(!(flags & XFS_BMAPI_CONVERT) || !(flags & XFS_BMAPI_REMAP));
/* zeroing is for currently only for data extents, not metadata */ /* zeroing is for currently only for data extents, not metadata */
ASSERT((flags & (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)) != ASSERT((flags & (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)) !=
...@@ -4640,13 +4637,8 @@ xfs_bmapi_write( ...@@ -4640,13 +4637,8 @@ xfs_bmapi_write(
} else { } else {
need_alloc = true; need_alloc = true;
} }
} else { } else if (isnullstartblock(bma.got.br_startblock)) {
/* wasdelay = true;
* Make sure we only reflink into a hole.
*/
ASSERT(!(flags & XFS_BMAPI_REMAP));
if (isnullstartblock(bma.got.br_startblock))
wasdelay = true;
} }
/* /*
...@@ -4775,6 +4767,94 @@ xfs_bmapi_write( ...@@ -4775,6 +4767,94 @@ xfs_bmapi_write(
return error; return error;
} }
static int
xfs_bmapi_remap(
struct xfs_trans *tp,
struct xfs_inode *ip,
xfs_fileoff_t bno,
xfs_filblks_t len,
xfs_fsblock_t startblock,
struct xfs_defer_ops *dfops)
{
struct xfs_mount *mp = ip->i_mount;
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
struct xfs_btree_cur *cur = NULL;
xfs_fsblock_t firstblock = NULLFSBLOCK;
struct xfs_bmbt_irec got;
xfs_extnum_t idx;
int logflags = 0, error;
ASSERT(len > 0);
ASSERT(len <= (xfs_filblks_t)MAXEXTLEN);
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
if (unlikely(XFS_TEST_ERROR(
(XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_EXTENTS &&
XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_BTREE),
mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
XFS_ERROR_REPORT("xfs_bmapi_remap", XFS_ERRLEVEL_LOW, mp);
return -EFSCORRUPTED;
}
if (XFS_FORCED_SHUTDOWN(mp))
return -EIO;
if (!(ifp->if_flags & XFS_IFEXTENTS)) {
error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK);
if (error)
return error;
}
if (xfs_iext_lookup_extent(ip, ifp, bno, &idx, &got)) {
/* make sure we only reflink into a hole. */
ASSERT(got.br_startoff > bno);
ASSERT(got.br_startoff - bno >= len);
}
error = xfs_bmap_remap_alloc(tp, ip, startblock, len);
if (error)
goto error0;
if (ifp->if_flags & XFS_IFBROOT) {
cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK);
cur->bc_private.b.firstblock = firstblock;
cur->bc_private.b.dfops = dfops;
cur->bc_private.b.flags = 0;
}
got.br_startoff = bno;
got.br_startblock = startblock;
got.br_blockcount = len;
got.br_state = XFS_EXT_NORM;
error = xfs_bmap_add_extent_hole_real(tp, ip, XFS_DATA_FORK, &idx, &cur,
&got, &firstblock, dfops, &logflags);
if (error)
goto error0;
if (xfs_bmap_wants_extents(ip, XFS_DATA_FORK)) {
int tmp_logflags = 0;
error = xfs_bmap_btree_to_extents(tp, ip, cur,
&tmp_logflags, XFS_DATA_FORK);
logflags |= tmp_logflags;
}
error0:
if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS)
logflags &= ~XFS_ILOG_DEXT;
else if (ip->i_d.di_format != XFS_DINODE_FMT_BTREE)
logflags &= ~XFS_ILOG_DBROOT;
if (logflags)
xfs_trans_log_inode(tp, ip, logflags);
if (cur) {
xfs_btree_del_cursor(cur,
error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
}
return error;
}
/* /*
* When a delalloc extent is split (e.g., due to a hole punch), the original * When a delalloc extent is split (e.g., due to a hole punch), the original
* indlen reservation must be shared across the two new extents that are left * indlen reservation must be shared across the two new extents that are left
...@@ -6493,16 +6573,7 @@ xfs_bmap_finish_one( ...@@ -6493,16 +6573,7 @@ xfs_bmap_finish_one(
xfs_filblks_t blockcount, xfs_filblks_t blockcount,
xfs_exntst_t state) xfs_exntst_t state)
{ {
struct xfs_bmbt_irec bmap; int error = 0, done;
int nimaps = 1;
xfs_fsblock_t firstfsb;
int done;
int error = 0;
bmap.br_startblock = startblock;
bmap.br_startoff = startoff;
bmap.br_blockcount = blockcount;
bmap.br_state = state;
trace_xfs_bmap_deferred(tp->t_mountp, trace_xfs_bmap_deferred(tp->t_mountp,
XFS_FSB_TO_AGNO(tp->t_mountp, startblock), type, XFS_FSB_TO_AGNO(tp->t_mountp, startblock), type,
...@@ -6519,16 +6590,12 @@ xfs_bmap_finish_one( ...@@ -6519,16 +6590,12 @@ xfs_bmap_finish_one(
switch (type) { switch (type) {
case XFS_BMAP_MAP: case XFS_BMAP_MAP:
firstfsb = bmap.br_startblock; error = xfs_bmapi_remap(tp, ip, startoff, blockcount,
error = xfs_bmapi_write(tp, ip, bmap.br_startoff, startblock, dfops);
bmap.br_blockcount, XFS_BMAPI_REMAP, &firstfsb,
bmap.br_blockcount, &bmap, &nimaps,
dfops);
break; break;
case XFS_BMAP_UNMAP: case XFS_BMAP_UNMAP:
error = xfs_bunmapi(tp, ip, bmap.br_startoff, error = xfs_bunmapi(tp, ip, startoff, blockcount,
bmap.br_blockcount, XFS_BMAPI_REMAP, 1, &firstfsb, XFS_BMAPI_REMAP, 1, &startblock, dfops, &done);
dfops, &done);
ASSERT(done); ASSERT(done);
break; break;
default: default:
......
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